Release groups not in this lists will not be recognized by FileBot, so if you stumble across missing release groups post them here and I'll add them to the list. Please post lists of release groups line-by-line with official upper-case/lower-case spelling (e.g. aXXo) so I can easily merge them into the online list. FileBot will update it's locally cached release group data from this online list once a day meaning this list is shared with all users.

If you use {group} you will want to make sure that your expression still works as intended even if {group} is undefined. This can easily be done by making the separator characters part of the {expression} code, e.g.

This is just a partial list off the top of my head, and some are obviously more widespread than others; but there are also more that I'm sure will show up later.

Is it possible for us to edit/create our own local group lists to override the global list? Even better is to keep the global list as it is (updating every 2 days), but to also merge it with a second list that's kept and maintained locally, by each user.

I've just started using a modified version of your regex to match groups and it works great. Most files I have are in either "-group.avi" or "group-blahblah.avi" and this hits the target just about every time.

I love how quickly they are actually usable in the program after posting, awesome, thank you.

Also I noticed, not a huge deal for me, but "RoCK&BlueLadyRG" ends up turning into "BlueLadyRG", maybe the & is an illegal character for binding or something, I don't know, but if it's an easy fix I'm just letting you know.

Just thought I'd post an update to my group matching expression above. This one matches groups in the format filename-group.ext, group-filename.ext, [group]filename.ext, filename[group].ext.

It includes a fix for false positives from shows/movies with titles that are hyphenated, e.g. "X-Men" would lead to: filename-X.ext.
It also no longer gives false positives for multi-part files in the format cd1-filename.ext or filename-cd1.ext.

This works for just about all the files I've thrown at it. Some formats it won't match are group.filename.ext or filename.group.ext and filename[group][group].ext, as I can't figure out a way to match these without producing a lot of false positives.